Strange transaction on account

Hey there, I've been a boostmobile user for several years now and just had a quick question for ya'll. Recently went to a local store and got a new phone.

I was charged:

$35 for the unlimited plan

$7 for a protective screen

$279 for the phone I purchased

$25 setup fee

$30 for a caseMy total transaction was $337.39 I received a receipt with all the detailed items posted above. these are the exact charges i can see.

There is a separate charge on my account now for $19.97 from boost and I am unsure what it is. I was wondering if anyone (maybe a mod / employee?) could assist in me in having an idea what that charge could be. The last thing I want is to accuse somebody from boost of using my card without me knowing. Cheers!